Mark Hamill at D23 Expo Legends Panel in 2017There are a couple of important dates that you need to know regarding the D23 Expo. August 14 is the final day that you can transfer a badge. August 15 will be the first day that you can put your name in for the Random Selection Process (RSP) for the major panels, and the final day will be August 19. If you’re selected to attend a panel, you will learn on or soon after September 2. You can learn more about RSP here.